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Page 19For technical questions, please call 1-800-444-3353.Item 90154
SAFETYOPERATIONMAINTENANCE ASSEMBLY
Tire Markings
Load index and
Speed rating*
European tire
certificate*
U.S. DOT tire
identification
number
*Information not required by U.S. DOT
Inner diameter
in inches
Section width
in inches
Trailer
tire
Maximum
load rating
Tire ply
composition
and materials
used
Maximum
permissible
inflation
pressure
• Section width- This number gives the width of the
tire in inches. The larger the number, the wider
the tire. (The markings on the example tire diagram
show 4.80. The markings on your tire may differ.)
• Inner diameter- This number gives the
inner diameter of the tire in inches.
This is also the rim diameter in inches.
(The markings on the example tire diagram show 12.
The markings on your tire may differ.)
• U.S. DOT tire identification number-
This begins with the letters “DOT” and indicates that
the tire meets all federal standards.
The next two numbers or letters are the plant code
where it was manufactured, and the last four
numbers represent the week and year that the tire
was built. For example, the numbers 2107 mean
the 21st week of 2007. Any other numbers used
are marketing codes used at the manufacturer’s
discretion. This information is used to contact
consumers if a tire defect requires a recall.
• Maximum Load Rating- This number
indicates the maximum load in kilograms and
pounds that can be carried by the tire.
• Load index- This is a measurement of how much
weight each tire can support. See chart below.
(The markings on the example tire diagram show 71.
The markings on your tire may differ.)
Note: You may not find this information on
all tires because it is not required by law.
Code Pounds
71 761
72 783
73 805
74 827
75 853
76 882
77 908
78 937
Code Pounds
79 963
80 992
81 1,019
82 1,047
83 1,074
84 1,102
85 1,135
86 1,168
Code Pounds
87 1,201
88 1,235
89 1,279
90 1,323
91 1,356
92 1,389
93 1,433
94 1,477
Code Pounds
95 1,521
96 1,565
97 1,609
98 1,653
99 1,709
100 1,764
101 1,819
102 1,874
Code Pounds
103 1,929
104 1,984
105 2,039
106 2,094
107 2,149
108 2,205
109 2,271
110 2,337
Table A: Load Index Rating Codes